im guessing a downpitched 1000/1003, considering a comment a man made about hearing these go off in the 50s, very well could be other sirens but im just guessing the bolt sound was the first that came up when the guy was making the video.
yea. people here dont really care about anybody elses hobbies but their own, i could probably get some binoculars and look for the motor number, or a higher powered camera than my phone.